What’s Vulnerable › Vulnerabilities

CVE-2024-50344: I, Librarian has a Stored XSS vulnerability in Supplemental Files

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-30 · updated 2026-06-17
• Weakness: CWE-80

Description

I, Librarian is an open-source version of a PDF managing SaaS. Supplemental Files are allowed to be viewed in the browser, only if they have a white-listed MIME type. Unfortunately, this logic is broken, thus allowing unsafe files containing Javascript to be executed with the application context. An attacker can exploit this vulnerability by uploading a supplementary file that contains a malicious code or script. This code will then be executed when the file is loaded in the browser. The vulnerability was fixed in version 5.11.2.

Affected products

• mkucej i-librarian-free: before 5.11.2

References

• https://github.com/mkucej/i-librarian-free/commit/a67d7949ffb02fd912ebdcf552df006b44066d78
• https://github.com/mkucej/i-librarian-free/security/advisories/GHSA-c2rm-w62w-5xmj

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